Without delay, let's solve this. We've got 915 and we will be multiplying it by 435, that is, adding 915 to itself 435 times.
Step 1: 0 + 915 = 915
Step 2: 915 + 915 = 1830
Step 3: 1830 + 915 = 2745
Step 4: 2745 + 915 = 3660
Step 5: 3660 + 915 = 4575
Step 6: 4575 + 915 = 5490
Step 7: 5490 + 915 = 6405
Step 8: 6405 + 915 = 7320
Step 9: 7320 + 915 = 8235
Step 10: 8235 + 915 = 9150
Step 11: 9150 + 915 = 10065
Step 12: 10065 + 915 = 10980
Step 13: 10980 + 915 = 11895
Step 14: 11895 + 915 = 12810
Step 15: 12810 + 915 = 13725
Step 16: 13725 + 915 = 14640
Step 17: 14640 + 915 = 15555
Step 18: 15555 + 915 = 16470
Step 19: 16470 + 915 = 17385
Step 20: 17385 + 915 = 18300
Step 21: 18300 + 915 = 19215
Step 22: 19215 + 915 = 20130
Step 23: 20130 + 915 = 21045
Step 24: 21045 + 915 = 21960
Step 25: 21960 + 915 = 22875
Step 26: 22875 + 915 = 23790
Step 27: 23790 + 915 = 24705
Step 28: 24705 + 915 = 25620
Step 29: 25620 + 915 = 26535
Step 30: 26535 + 915 = 27450
Step 31: 27450 + 915 = 28365
Step 32: 28365 + 915 = 29280
Step 33: 29280 + 915 = 30195
Step 34: 30195 + 915 = 31110
Step 35: 31110 + 915 = 32025
Step 36: 32025 + 915 = 32940
Step 37: 32940 + 915 = 33855
Step 38: 33855 + 915 = 34770
Step 39: 34770 + 915 = 35685
Step 40: 35685 + 915 = 36600
Step 41: 36600 + 915 = 37515
Step 42: 37515 + 915 = 38430
Step 43: 38430 + 915 = 39345
Step 44: 39345 + 915 = 40260
Step 45: 40260 + 915 = 41175
Step 46: 41175 + 915 = 42090
Step 47: 42090 + 915 = 43005
Step 48: 43005 + 915 = 43920
Step 49: 43920 + 915 = 44835
Step 50: 44835 + 915 = 45750
Step 51: 45750 + 915 = 46665
Step 52: 46665 + 915 = 47580
Step 53: 47580 + 915 = 48495
Step 54: 48495 + 915 = 49410
Step 55: 49410 + 915 = 50325
Step 56: 50325 + 915 = 51240
Step 57: 51240 + 915 = 52155
Step 58: 52155 + 915 = 53070
Step 59: 53070 + 915 = 53985
Step 60: 53985 + 915 = 54900
Step 61: 54900 + 915 = 55815
Step 62: 55815 + 915 = 56730
Step 63: 56730 + 915 = 57645
Step 64: 57645 + 915 = 58560
Step 65: 58560 + 915 = 59475
Step 66: 59475 + 915 = 60390
Step 67: 60390 + 915 = 61305
Step 68: 61305 + 915 = 62220
Step 69: 62220 + 915 = 63135
Step 70: 63135 + 915 = 64050
Step 71: 64050 + 915 = 64965
Step 72: 64965 + 915 = 65880
Step 73: 65880 + 915 = 66795
Step 74: 66795 + 915 = 67710
Step 75: 67710 + 915 = 68625
Step 76: 68625 + 915 = 69540
Step 77: 69540 + 915 = 70455
Step 78: 70455 + 915 = 71370
Step 79: 71370 + 915 = 72285
Step 80: 72285 + 915 = 73200
Step 81: 73200 + 915 = 74115
Step 82: 74115 + 915 = 75030
Step 83: 75030 + 915 = 75945
Step 84: 75945 + 915 = 76860
Step 85: 76860 + 915 = 77775
Step 86: 77775 + 915 = 78690
Step 87: 78690 + 915 = 79605
Step 88: 79605 + 915 = 80520
Step 89: 80520 + 915 = 81435
Step 90: 81435 + 915 = 82350
Step 91: 82350 + 915 = 83265
Step 92: 83265 + 915 = 84180
Step 93: 84180 + 915 = 85095
Step 94: 85095 + 915 = 86010
Step 95: 86010 + 915 = 86925
Step 96: 86925 + 915 = 87840
Step 97: 87840 + 915 = 88755
Step 98: 88755 + 915 = 89670
Step 99: 89670 + 915 = 90585
Step 100: 90585 + 915 = 91500
Step 101: 91500 + 915 = 92415
Step 102: 92415 + 915 = 93330
Step 103: 93330 + 915 = 94245
Step 104: 94245 + 915 = 95160
Step 105: 95160 + 915 = 96075
Step 106: 96075 + 915 = 96990
Step 107: 96990 + 915 = 97905
Step 108: 97905 + 915 = 98820
Step 109: 98820 + 915 = 99735
Step 110: 99735 + 915 = 100650
Step 111: 100650 + 915 = 101565
Step 112: 101565 + 915 = 102480
Step 113: 102480 + 915 = 103395
Step 114: 103395 + 915 = 104310
Step 115: 104310 + 915 = 105225
Step 116: 105225 + 915 = 106140
Step 117: 106140 + 915 = 107055
Step 118: 107055 + 915 = 107970
Step 119: 107970 + 915 = 108885
Step 120: 108885 + 915 = 109800
Step 121: 109800 + 915 = 110715
Step 122: 110715 + 915 = 111630
Step 123: 111630 + 915 = 112545
Step 124: 112545 + 915 = 113460
Step 125: 113460 + 915 = 114375
Step 126: 114375 + 915 = 115290
Step 127: 115290 + 915 = 116205
Step 128: 116205 + 915 = 117120
Step 129: 117120 + 915 = 118035
Step 130: 118035 + 915 = 118950
Step 131: 118950 + 915 = 119865
Step 132: 119865 + 915 = 120780
Step 133: 120780 + 915 = 121695
Step 134: 121695 + 915 = 122610
Step 135: 122610 + 915 = 123525
Step 136: 123525 + 915 = 124440
Step 137: 124440 + 915 = 125355
Step 138: 125355 + 915 = 126270
Step 139: 126270 + 915 = 127185
Step 140: 127185 + 915 = 128100
Step 141: 128100 + 915 = 129015
Step 142: 129015 + 915 = 129930
Step 143: 129930 + 915 = 130845
Step 144: 130845 + 915 = 131760
Step 145: 131760 + 915 = 132675
Step 146: 132675 + 915 = 133590
Step 147: 133590 + 915 = 134505
Step 148: 134505 + 915 = 135420
Step 149: 135420 + 915 = 136335
Step 150: 136335 + 915 = 137250
Step 151: 137250 + 915 = 138165
Step 152: 138165 + 915 = 139080
Step 153: 139080 + 915 = 139995
Step 154: 139995 + 915 = 140910
Step 155: 140910 + 915 = 141825
Step 156: 141825 + 915 = 142740
Step 157: 142740 + 915 = 143655
Step 158: 143655 + 915 = 144570
Step 159: 144570 + 915 = 145485
Step 160: 145485 + 915 = 146400
Step 161: 146400 + 915 = 147315
Step 162: 147315 + 915 = 148230
Step 163: 148230 + 915 = 149145
Step 164: 149145 + 915 = 150060
Step 165: 150060 + 915 = 150975
Step 166: 150975 + 915 = 151890
Step 167: 151890 + 915 = 152805
Step 168: 152805 + 915 = 153720
Step 169: 153720 + 915 = 154635
Step 170: 154635 + 915 = 155550
Step 171: 155550 + 915 = 156465
Step 172: 156465 + 915 = 157380
Step 173: 157380 + 915 = 158295
Step 174: 158295 + 915 = 159210
Step 175: 159210 + 915 = 160125
Step 176: 160125 + 915 = 161040
Step 177: 161040 + 915 = 161955
Step 178: 161955 + 915 = 162870
Step 179: 162870 + 915 = 163785
Step 180: 163785 + 915 = 164700
Step 181: 164700 + 915 = 165615
Step 182: 165615 + 915 = 166530
Step 183: 166530 + 915 = 167445
Step 184: 167445 + 915 = 168360
Step 185: 168360 + 915 = 169275
Step 186: 169275 + 915 = 170190
Step 187: 170190 + 915 = 171105
Step 188: 171105 + 915 = 172020
Step 189: 172020 + 915 = 172935
Step 190: 172935 + 915 = 173850
Step 191: 173850 + 915 = 174765
Step 192: 174765 + 915 = 175680
Step 193: 175680 + 915 = 176595
Step 194: 176595 + 915 = 177510
Step 195: 177510 + 915 = 178425
Step 196: 178425 + 915 = 179340
Step 197: 179340 + 915 = 180255
Step 198: 180255 + 915 = 181170
Step 199: 181170 + 915 = 182085
Step 200: 182085 + 915 = 183000
Step 201: 183000 + 915 = 183915
Step 202: 183915 + 915 = 184830
Step 203: 184830 + 915 = 185745
Step 204: 185745 + 915 = 186660
Step 205: 186660 + 915 = 187575
Step 206: 187575 + 915 = 188490
Step 207: 188490 + 915 = 189405
Step 208: 189405 + 915 = 190320
Step 209: 190320 + 915 = 191235
Step 210: 191235 + 915 = 192150
Step 211: 192150 + 915 = 193065
Step 212: 193065 + 915 = 193980
Step 213: 193980 + 915 = 194895
Step 214: 194895 + 915 = 195810
Step 215: 195810 + 915 = 196725
Step 216: 196725 + 915 = 197640
Step 217: 197640 + 915 = 198555
Step 218: 198555 + 915 = 199470
Step 219: 199470 + 915 = 200385
Step 220: 200385 + 915 = 201300
Step 221: 201300 + 915 = 202215
Step 222: 202215 + 915 = 203130
Step 223: 203130 + 915 = 204045
Step 224: 204045 + 915 = 204960
Step 225: 204960 + 915 = 205875
Step 226: 205875 + 915 = 206790
Step 227: 206790 + 915 = 207705
Step 228: 207705 + 915 = 208620
Step 229: 208620 + 915 = 209535
Step 230: 209535 + 915 = 210450
Step 231: 210450 + 915 = 211365
Step 232: 211365 + 915 = 212280
Step 233: 212280 + 915 = 213195
Step 234: 213195 + 915 = 214110
Step 235: 214110 + 915 = 215025
Step 236: 215025 + 915 = 215940
Step 237: 215940 + 915 = 216855
Step 238: 216855 + 915 = 217770
Step 239: 217770 + 915 = 218685
Step 240: 218685 + 915 = 219600
Step 241: 219600 + 915 = 220515
Step 242: 220515 + 915 = 221430
Step 243: 221430 + 915 = 222345
Step 244: 222345 + 915 = 223260
Step 245: 223260 + 915 = 224175
Step 246: 224175 + 915 = 225090
Step 247: 225090 + 915 = 226005
Step 248: 226005 + 915 = 226920
Step 249: 226920 + 915 = 227835
Step 250: 227835 + 915 = 228750
Step 251: 228750 + 915 = 229665
Step 252: 229665 + 915 = 230580
Step 253: 230580 + 915 = 231495
Step 254: 231495 + 915 = 232410
Step 255: 232410 + 915 = 233325
Step 256: 233325 + 915 = 234240
Step 257: 234240 + 915 = 235155
Step 258: 235155 + 915 = 236070
Step 259: 236070 + 915 = 236985
Step 260: 236985 + 915 = 237900
Step 261: 237900 + 915 = 238815
Step 262: 238815 + 915 = 239730
Step 263: 239730 + 915 = 240645
Step 264: 240645 + 915 = 241560
Step 265: 241560 + 915 = 242475
Step 266: 242475 + 915 = 243390
Step 267: 243390 + 915 = 244305
Step 268: 244305 + 915 = 245220
Step 269: 245220 + 915 = 246135
Step 270: 246135 + 915 = 247050
Step 271: 247050 + 915 = 247965
Step 272: 247965 + 915 = 248880
Step 273: 248880 + 915 = 249795
Step 274: 249795 + 915 = 250710
Step 275: 250710 + 915 = 251625
Step 276: 251625 + 915 = 252540
Step 277: 252540 + 915 = 253455
Step 278: 253455 + 915 = 254370
Step 279: 254370 + 915 = 255285
Step 280: 255285 + 915 = 256200
Step 281: 256200 + 915 = 257115
Step 282: 257115 + 915 = 258030
Step 283: 258030 + 915 = 258945
Step 284: 258945 + 915 = 259860
Step 285: 259860 + 915 = 260775
Step 286: 260775 + 915 = 261690
Step 287: 261690 + 915 = 262605
Step 288: 262605 + 915 = 263520
Step 289: 263520 + 915 = 264435
Step 290: 264435 + 915 = 265350
Step 291: 265350 + 915 = 266265
Step 292: 266265 + 915 = 267180
Step 293: 267180 + 915 = 268095
Step 294: 268095 + 915 = 269010
Step 295: 269010 + 915 = 269925
Step 296: 269925 + 915 = 270840
Step 297: 270840 + 915 = 271755
Step 298: 271755 + 915 = 272670
Step 299: 272670 + 915 = 273585
Step 300: 273585 + 915 = 274500
Step 301: 274500 + 915 = 275415
Step 302: 275415 + 915 = 276330
Step 303: 276330 + 915 = 277245
Step 304: 277245 + 915 = 278160
Step 305: 278160 + 915 = 279075
Step 306: 279075 + 915 = 279990
Step 307: 279990 + 915 = 280905
Step 308: 280905 + 915 = 281820
Step 309: 281820 + 915 = 282735
Step 310: 282735 + 915 = 283650
Step 311: 283650 + 915 = 284565
Step 312: 284565 + 915 = 285480
Step 313: 285480 + 915 = 286395
Step 314: 286395 + 915 = 287310
Step 315: 287310 + 915 = 288225
Step 316: 288225 + 915 = 289140
Step 317: 289140 + 915 = 290055
Step 318: 290055 + 915 = 290970
Step 319: 290970 + 915 = 291885
Step 320: 291885 + 915 = 292800
Step 321: 292800 + 915 = 293715
Step 322: 293715 + 915 = 294630
Step 323: 294630 + 915 = 295545
Step 324: 295545 + 915 = 296460
Step 325: 296460 + 915 = 297375
Step 326: 297375 + 915 = 298290
Step 327: 298290 + 915 = 299205
Step 328: 299205 + 915 = 300120
Step 329: 300120 + 915 = 301035
Step 330: 301035 + 915 = 301950
Step 331: 301950 + 915 = 302865
Step 332: 302865 + 915 = 303780
Step 333: 303780 + 915 = 304695
Step 334: 304695 + 915 = 305610
Step 335: 305610 + 915 = 306525
Step 336: 306525 + 915 = 307440
Step 337: 307440 + 915 = 308355
Step 338: 308355 + 915 = 309270
Step 339: 309270 + 915 = 310185
Step 340: 310185 + 915 = 311100
Step 341: 311100 + 915 = 312015
Step 342: 312015 + 915 = 312930
Step 343: 312930 + 915 = 313845
Step 344: 313845 + 915 = 314760
Step 345: 314760 + 915 = 315675
Step 346: 315675 + 915 = 316590
Step 347: 316590 + 915 = 317505
Step 348: 317505 + 915 = 318420
Step 349: 318420 + 915 = 319335
Step 350: 319335 + 915 = 320250
Step 351: 320250 + 915 = 321165
Step 352: 321165 + 915 = 322080
Step 353: 322080 + 915 = 322995
Step 354: 322995 + 915 = 323910
Step 355: 323910 + 915 = 324825
Step 356: 324825 + 915 = 325740
Step 357: 325740 + 915 = 326655
Step 358: 326655 + 915 = 327570
Step 359: 327570 + 915 = 328485
Step 360: 328485 + 915 = 329400
Step 361: 329400 + 915 = 330315
Step 362: 330315 + 915 = 331230
Step 363: 331230 + 915 = 332145
Step 364: 332145 + 915 = 333060
Step 365: 333060 + 915 = 333975
Step 366: 333975 + 915 = 334890
Step 367: 334890 + 915 = 335805
Step 368: 335805 + 915 = 336720
Step 369: 336720 + 915 = 337635
Step 370: 337635 + 915 = 338550
Step 371: 338550 + 915 = 339465
Step 372: 339465 + 915 = 340380
Step 373: 340380 + 915 = 341295
Step 374: 341295 + 915 = 342210
Step 375: 342210 + 915 = 343125
Step 376: 343125 + 915 = 344040
Step 377: 344040 + 915 = 344955
Step 378: 344955 + 915 = 345870
Step 379: 345870 + 915 = 346785
Step 380: 346785 + 915 = 347700
Step 381: 347700 + 915 = 348615
Step 382: 348615 + 915 = 349530
Step 383: 349530 + 915 = 350445
Step 384: 350445 + 915 = 351360
Step 385: 351360 + 915 = 352275
Step 386: 352275 + 915 = 353190
Step 387: 353190 + 915 = 354105
Step 388: 354105 + 915 = 355020
Step 389: 355020 + 915 = 355935
Step 390: 355935 + 915 = 356850
Step 391: 356850 + 915 = 357765
Step 392: 357765 + 915 = 358680
Step 393: 358680 + 915 = 359595
Step 394: 359595 + 915 = 360510
Step 395: 360510 + 915 = 361425
Step 396: 361425 + 915 = 362340
Step 397: 362340 + 915 = 363255
Step 398: 363255 + 915 = 364170
Step 399: 364170 + 915 = 365085
Step 400: 365085 + 915 = 366000
Step 401: 366000 + 915 = 366915
Step 402: 366915 + 915 = 367830
Step 403: 367830 + 915 = 368745
Step 404: 368745 + 915 = 369660
Step 405: 369660 + 915 = 370575
Step 406: 370575 + 915 = 371490
Step 407: 371490 + 915 = 372405
Step 408: 372405 + 915 = 373320
Step 409: 373320 + 915 = 374235
Step 410: 374235 + 915 = 375150
Step 411: 375150 + 915 = 376065
Step 412: 376065 + 915 = 376980
Step 413: 376980 + 915 = 377895
Step 414: 377895 + 915 = 378810
Step 415: 378810 + 915 = 379725
Step 416: 379725 + 915 = 380640
Step 417: 380640 + 915 = 381555
Step 418: 381555 + 915 = 382470
Step 419: 382470 + 915 = 383385
Step 420: 383385 + 915 = 384300
Step 421: 384300 + 915 = 385215
Step 422: 385215 + 915 = 386130
Step 423: 386130 + 915 = 387045
Step 424: 387045 + 915 = 387960
Step 425: 387960 + 915 = 388875
Step 426: 388875 + 915 = 389790
Step 427: 389790 + 915 = 390705
Step 428: 390705 + 915 = 391620
Step 429: 391620 + 915 = 392535
Step 430: 392535 + 915 = 393450
Step 431: 393450 + 915 = 394365
Step 432: 394365 + 915 = 395280
Step 433: 395280 + 915 = 396195
Step 434: 396195 + 915 = 397110
Step 435: 397110 + 915 = 398025

So, 915*435 = 398025